RKI Instruments 65-2510RK - Manual (Page 13)

65-2502RK/65-2510RK Oxygen Detector • 9
1. Screw the calibration cup onto the detector housing.
2. Screw the regulator into the zero air calibration cylinder. Make sure the regulator is
off. It is off when the on/off knob is turned all the way clockwise.
3. Use the sample tubing to connect the regulator to the calibration cup.
NOTE: If you can verify that the oxygen detector is in a fresh air environment, you do
not need to apply zero air to the detector before adjusting the fresh air reading.
4. Put the controller into its calibration program. See the controller operator’s manual
for instructions to enter the calibration program.
Setting the Fresh Air Reading
1. Follow the directions in the controller’s instruction manual for setting the fresh air
reading to 20.9% oxygen.
2. When the instructions call for exposing the detector to zero air, turn the regulator’s
on/off knob counterclockwise to open it.
3. Allow the gas to flow to the detector for 2 minutes.
4. Set the fresh air reading according to the controller operator’s manual.
5. Turn the regulator’s on/off knob clockwise to close it.
6. Unscrew the regulator from the zero air calibration cylinder. Leave the sample tubing
connected to the regulator and the calibration cup.
NOTE: Depending on the size of your zero air cylinder, it is possible that you will have a
different regulator for the zero air cylinder and the nitrogen gas cylinder. If
necessary to fit the nitrogen gas cylinder, change the regulator.
Setting the Zero Reading
1. Screw the regulator into the 100% nitrogen calibration cylinder.
2. Follow the instructions in the controller’s operator’s manual for setting the oxygen
zero reading.
3. When the instructions call for exposing the detector to gas, turn the regulator’s on/off
knob counterclockwise to open it.
4. Allow the gas to flow to the detector for 2 minutes.
5. Set the zero reading according to the controller operator’s manual.
6. Turn the regulator’s on/off knob clockwise to close it.
7. Unscrew the regulator from the calibration cylinder.
8. Unscrew the calibration cup from the detector.
NOTE: For convenience, leave the components of the calibration kit connected by the
sample tubing.
Returning to Normal Operation
1. When the display reading rises above the decreasing alarm setpoint, return the
controller to normal operation.